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Half Life Gizmo

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Student Exploration: Half-life NCVPS Chemistry Fall 2014 1. Have you ever made microwave popcorn? If so, what do you hear while the popcorn is in the microwave? Popping 2. If you turn the microwav ... e on for two minutes, is the rate of popping always the same, or does it change? Explain: It changes. Sometimes there is no popping and 3. at other time there is a lot of popping Gizmo Warm-up Like an un-popped kernel in the microwave, a radioactive atom can change at any time. Radioactive atoms change by emitting radiation in the form of tiny particles and/or energy. This process, called decay, causes the radioactive atom to change into a stable daughter atom. 1. What do you see and hear? Note: The clicking sound you hear comes from a Geiger counter, an instrument that detects the particles and energy emitted by decaying radioactive atoms: I see all the atoms decaying to daughter atoms. I hear a clicking sound kind of like the one you hear when popcorn pops 2. What remains at the end of the decay process? Only daughter atoms remain 3. Is the rate of decay fastest at the beginning, middle, or end of the process? It’s faster at the beginning [Show More]

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